Posted by **Mary ** on Sunday, March 7, 2010 at 2:40pm.

When we convert x-value to z- score and use Standard Normal distribution, which of the following statements is true?

a) The mean of z-score is zero and standard deviation of the z-scores is the same as

the standard deviation of original data

b) The mean and standard deviation of the z-scores is the same as the mean and standard deviation of original data

c) The mean of the z-scores is 0 and the standard deviation of z-scores is 1

d) The mean and the standard deviation of z-scores will be both zero

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